Class Timer

const timer = new Timer(1000); // every 1000ms
timer.addEventListener('tick', ()=> console.log('Hello!');
timer.start();

You can create an once timer.

const timer = new Timer(1000, { once: true });
timer.addEventListener('tick', ()=> console.log('Hello!');
timer.start();

Note: You should call addEventListener before start the timer. Otherwise, the timer may fire tick event without listeners.